Implemented checks for PositionalSuperKo, but it slows down getPossibleMoves a lot...
Changed the KGS application to wait to delete UCTNodes and make the chosen move until after notifying the server
Implemented Board::eliminatePositionalSuperKo that is used to prevent illegal moves due to PositionalSuperKo
Changed Group::addStone to increase numberLiberties intelligently instead of calling Group::recalculateLiberties